TWI459018B - Gamma dose rate measurement system - Google Patents

Description

Gamma ray dose rate measurement system

The present invention relates to a metrology system, and more particularly to the field of a gamma ray dose rate measurement system.

In recent years, the issue of nuclear energy safety has always been a topic of concern to the public. Previously, due to the severe damage caused by the Japanese nuclear power plant caused by the Japanese tsunami, radiation leakage was serious. Such leaking radiation particles are all invisible alpha, beta, gamma, etc. Particles, too much contact with these particles will cause harm to the human body. Exposure exceeding a certain amount may even cause immediate danger to life.

At present, special instruments are required for detecting such radiation particle systems, and the instruments are relatively small in size and relatively expensive, such as a Geiger counter, a scintillation scintillator, and the like. On the other hand, there is a small armband type thermal illuminating detection device on the market. Although it is quite convenient to use, it must be sent to a dedicated instrument for interpretation after a period of time. It is impossible to know immediately whether the radiation dose in the environment is present. Exceeding the safety value, its utility is limited to post-recording.

With the advancement and development of technology, there are also pen-type or watch-type radiation dosimeters on the market that allow users to carry around and detect whether the radiation dose at the location exceeds the safe value. However, such pen type or other portable radiation dosimeters require battery power to supplement the power supply, and there is no statistical and charting effect.

The device for detecting and evaluating the invisible light particle dose calculation interface disclosed in the Republic of China Invention Patent Application No. 100115017, which uses a mobile device (such as a smart phone) commonly used in daily life to detect whether the amount of radiation is instantaneous. Exceeding the safe value, and using the communication function to transmit the detection value of the detection area to inform the surrounding people to know, so that the individual can be more convenient to carry and use. However, this invention requires a flickering crystal to be placed in front of the image sensor for converting invisible particles into visible light and then entering the image sensor. Although this method can detect the radiation dose using a mobile device, it needs to add one more piece. A scintillation crystal containing a rare element will greatly increase its cost and require regular calibration, which is not practical for the general public. Therefore, how to directly and conveniently detect an gamma ray using an image sensor of an electronic device is an urgent problem to be solved.

The Applicant of the present invention has proposed a gamma ray dose rate measurement system to address the difficulties and needs of the above-described prior art.

In view of the above-described problems of the prior art, it is an object of the present invention to provide a gamma ray dose rate measurement system that can include a shading device and an electronic device. The light shielding device can shield a visible light, such that the light source passing through the light shielding device is substantially a gamma ray; the electronic device can include a sensing module, an image analysis module, and a display module. The sensing module can sense the gamma ray to generate a current signal; the image analysis module can receive the current signal and analyze the current signal to generate a sum of a gamma ray dose rate sum and a gamma ray energy spectrum. The display module displays the analysis results. The light shielding device is detachably coupled to the electronic device and can be disposed on the optical path of the external light source into the sensing module, so that the light source entering the sensing module is substantially a gamma ray.

Preferably, the shading device can be a columnar structure or a sheet structure.

Preferably, the shading device may be an opaque metal material or an alloy thereof, an opaque non-metal material or a composite material thereof or a combination thereof.

Preferably, the sensing module can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD) image sensor.

Preferably, the image analysis module can include a processor unit, a storage unit, and a dose rate calculation unit; the processor unit can analyze the current signal to generate a gamma ray image and store it in the storage unit; the dose rate calculation unit The gamma ray image can be read and a dose rate calculation performed to obtain a gamma ray dose rate sum and a gamma ray energy spectrum.

Preferably, the dose rate calculation can be completed by a noise filtering module, a pixel brightness statistical module and a dose rate conversion module included in the dose rate calculating unit; the noise filtering module can be first The gamma ray image is filtered by a noise, and the pixel brightness statistic module can perform a pixel brightness statistic according to the gamma ray image after the noise filtering, and the dose rate conversion module can further calculate the brightness of the pixel. The gamma ray image is subjected to a dose rate conversion.

Preferably, the noise filtering can be completed by one of the color discrimination module and the one pixel communication mark module included in the noise filtering module; the color discrimination module can view and judge the brightness value of the pixel one by one. Whether the relationship of the proportional parameter m conforms to IR≦(IG+1)×m or IB≦(IG+1)×m, where IR, IG, and IB are the red, green, and blue luminance values of the pixel, respectively, 1≦m≦ 2; if it is met, it can be regarded as a first signal pixel, otherwise it can be regarded as a first noise pixel and delete the first noise pixel; the pixel connection mark module can give the first signal pixel in the same connected area to one Same mark, and can be added again The first signal pixel having the same mark determines the size of the connected area. If the size of the connected area exceeds a predetermined size, it can be regarded as the second signal pixel, and vice versa, the second noise pixel can be regarded as the second noise pixel.

Preferably, the pixel brightness statistics can be completed by a pixel brightness summation module and a pixel brightness value square image module included in the pixel brightness statistics module; the pixel brightness summation module can all the gamma ray images The luminance values of one of the two signal pixels are summed to satisfy the following conditions:

Wherein, the ITOT is the sum of the brightness of one pixel of the second signal pixel, and the dimension of the gamma ray image is M×N, wherein M and N are positive integers, and Ii is a brightness value; the pixel brightness value square image module can be one-dimensional The function accumulates the number of each luminance value and counts a luminance distribution characteristic to generate a pixel luminance value square graph. The one-dimensional function satisfies the following conditions:

Where k is the number of categories of luminance value classification, which may range from 0 to 255.

Preferably, the dose rate conversion module converts the total brightness of the pixels by the dose rate conversion module into a sum of the gamma ray dose rate of the actual measurement through the calibration curve and converts the pixel brightness value map into a practical one through the calibration curve. The received gamma ray energy spectrum is completed; the calibration curve satisfies the following conditions: D = aI _TOT + b

Where D is the sum of the gamma ray dose rates, a and b are constants and a>0 and b≧0.

As described above, the gamma ray dose rate measurement system according to the present invention can eliminate the need for an additional scintillation crystal containing rare elements when sensing the radiation, thereby greatly reducing the cost and increasing the convenience of use. The user of the electronic device can also invent the gamma ray dose rate and related information of the tested location without using an additional power source, so that the electronic device can be brought into the field of further application and effectively improved. Convenience.

100‧‧‧shading device

110‧‧‧gamma ray

200‧‧‧Electronic devices

201‧‧‧Sense Module

203‧‧‧Image Analysis Module

204‧‧‧Display module

205‧‧‧gamma ray image

210‧‧‧ Processor unit

220‧‧‧ storage unit

230‧‧‧Dose Rate Calculation Unit

240‧‧‧ Noise Filter Module

241‧‧‧Color Identification Module

242‧‧‧Pixel Connected Marker Module

250‧‧‧pixel brightness statistics module

251‧‧‧pixel brightness summation module

252‧‧‧Pixel value map

260‧‧‧Dose Rate Conversion Module

270‧‧‧ gamma ray dose rate sum

280‧‧‧gamma ray energy spectrum

Figure 1 is a schematic illustration of a gamma ray dose rate measurement system of the present invention.

Figure 2 is a block diagram of the gamma ray dose rate measurement system of the present invention.

Figure 3 is a block diagram of the dose rate calculation unit of the gamma ray dose rate measurement system of the present invention.

Figure 4 is a block diagram of the noise filtering module of the gamma ray dose rate measuring system of the present invention.

Figure 5 is a block diagram of a pixel luminance statistical module of the gamma ray dose rate measurement system of the present invention.

Embodiments of the gamma ray dose rate measuring system according to the present invention will be described below with reference to the related drawings. For ease of understanding, the same components of the same functions in any of the following embodiments are denoted by the same component symbols. Mark to illustrate.

Please refer to FIG. 1 , which is a schematic diagram of a gamma ray dose rate measurement system of the present invention. As shown, the gamma ray dose rate measurement system of the present invention includes a shading device 100 and an electronic device 200. The light-shielding device 100 can shield a visible light, such that the light source passing through the light-shielding device 100 is substantially a gamma ray; the electronic device 200 can include a sensing module 201, an image analysis module 203, and a display module 204. The sensing module 201 can sense the gamma ray to generate a current signal; the image analyzing module 203 can receive the current signal and analyze the current signal to generate one of a gamma ray dose rate sum and a gamma ray energy spectrum. Analysis results; the display module can display the analysis results. The light shielding device 100 is detachably coupled to the electronic device 200 and can be disposed on the optical path of the external light source to enter the sensing module 201, so that the light source entering the sensing module 201 is substantially a gamma ray.

In addition, the light shielding device 100 can be a columnar structure, a thin sheet structure or any shape structure that can cover the shielding sensing module 201. The material of the light shielding device 100 may be an opaque metal material or an alloy thereof, an opaque non-metal material or a composite material thereof or a combination thereof. In a preferred embodiment, the light-shielding device 100 can further have an adsorbing material, a fastening material, a locking material, and the like (not shown), and can be easily engaged or disengaged with the electronic device 200, and It is necessary to change the appearance or appearance of the original electronic device 200. On the other hand, the sensing module 201 can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD) image sensor, but should not be limited thereto. It should be noted that the electronic device 200 can be a smart phone, a tablet, a handheld game console, or a personal action secretary, but should not be limited thereto.

During the use of the user, the light-shielding device 100 can be properly connected to the electronic device 200 (such as the external light source entering the optical path of the sensing module 201), and the light source of the external environment will be shielded by the light-shielding device 100. Only when the external environment has an isotope capable of decaying to emit gamma rays, the gamma rays emitted therefrom can pass through the shading device 100 to enter the sensing module 201. The sensing module 201 converts the sensed gamma ray into a current signal, and the image analyzing module 203 of the electronic device 200 receives the current signal for analysis, and displays the analysis result (eg, the gamma ray image 205) for display. Module 204 is displayed.

Please refer to FIG. 2, which is a block diagram of the gamma ray dose rate measurement system of the present invention. As shown in the figure, after the gamma ray 110 of the external environment enters the sensing module 201, the sensing module 201 converts the sensed gamma ray 110 into a current signal and transmits it to the image analyzing module 203 for analysis. The image analysis module 203 can include a processor unit 210, a storage unit 220, and a dose rate calculation unit 230. The processor unit 210 can analyze the current signal received from the sensing module 201 to generate a gamma ray image and store it in the storage unit 220. The dose rate calculation unit 230 can read the gamma ray image in the storage unit 220 and perform a The dose rate is calculated to obtain a sum of the gamma ray dose rate and the gamma ray energy spectrum and the gamma ray dose rate sum and the gamma ray energy spectrum are again stored in the storage unit 220 to provide the display module 204 to display the analysis results. The processor unit 210 can be a central processing unit, a microprocessor, an image processor, a digital signal processor, or a logical processor. The storage unit 220 can be a dynamic random access memory, a static random access memory, or Regularized read-only memory, erasable and configurable read-only memory, or electrically erasable, read-only memory or flash memory, but should not be limited.

It should be noted that, in a preferred embodiment, the user can determine whether to perform a fixed time interval or a dynamic continuous detection according to the analysis results displayed by the display module 204. In detail, the user can determine the time when the sensing module 201 senses the sampled gamma ray 110 and immediately reflects it in the gamma ray image, the gamma ray dose rate sum or the gamma ray energy spectrum to obtain more details. Statistics.

Please refer to FIG. 3 to FIG. 5 together. FIG. 3 is a block diagram of the dose rate calculation unit of the gamma ray dose rate measurement system of the present invention, and FIG. 4 is the gamma ray dose rate of the present invention. The block diagram of the noise filtering module of the measuring system, and FIG. 5 is the block of the pixel brightness statistical module of the gamma ray dose rate measuring system of the present invention. Figure. As shown in FIG. 3, the gamma ray image 205 can be used to calculate the dose rate by the dose rate calculation unit 230. The dose rate calculation unit 230 can include a noise filtering module 240, a pixel brightness statistic module 250, and a The dose rate conversion module 260; the noise filtering module 240 may first perform noise filtering on the gamma ray image 205, and the pixel brightness statistic module 250 may continue to perform pixels according to the gamma ray image after the noise filtering. The brightness rate statistics, the dose rate conversion module 260 can further perform dose rate conversion on the gamma ray image after the pixel brightness statistics to obtain the gamma ray dose rate sum 270 and the gamma ray energy spectrum 280, and store the same to the storage unit 220. .

The noise filtering can be completed by one of the color discrimination module 241 and the one pixel communication mark module 242 included in the noise filtering module 240 (as shown in FIG. 4). The color discrimination module 241 can view and determine whether the relationship between the pixel luminance value of the gamma ray image 205 and a proportional parameter m conforms to IR≦(IG+1)×m or IB≦(IG+1)×m, wherein IR, IG, and IB are the red, green, and blue luminance values of the pixel, respectively, 1≦m≦2; if they match, they can be regarded as a first signal pixel, otherwise they can be regarded as a first noise pixel and delete the first impurity. Signal pixel. In addition, the pixel-connected mark module 242 can give the same signal to the first signal pixel in the same connected area, and can further determine the size of the connected area by accumulating the first signal pixel having the same mark, if the size of the connected area exceeds A predetermined size may be regarded as a second signal pixel, and vice versa may be regarded as a second noise pixel and the second noise pixel is deleted, and the second signal pixel is transmitted to the pixel brightness statistics module 250.

In addition, the user can count the second signal pixel received from the noise filtering module 240 by using the pixel brightness summation module 251 and the pixel brightness value module 252 included in the pixel brightness statistics module 250 (eg, Figure 5). The pixel brightness summation module 251 can add the luminance values of all the second signal pixels in the gamma ray image to meet the following conditions:

Wherein, the ITOT is the sum of the brightness of one of the second signal pixels, and the dimension of the gamma ray image is M×N, wherein M and N are positive integers, and Ii is a brightness value. The pixel luminance value square graph module 252 can accumulate the number of each luminance value by using a one-dimensional function and count the luminance distribution characteristics to generate a pixel luminance value square graph, and the one-dimensional function satisfies the following conditions:

Where k is the number of categories of luminance value classification, which may range from 0 to 255.

That is to say, after the sum of the pixel brightness calculated by the pixel brightness summation module 251 and the pixel brightness value square image calculated by the pixel brightness value square graph module 252, the pixel brightness sum and the pixel brightness value square map can be respectively transmitted to the dose. Rate conversion module 260 for dose rate conversion.

The dose rate conversion module 260 converts the pixel brightness sum ITOT through a calibration curve to the actual measured gamma ray dose rate sum 270, and the dose rate conversion module 260 can also pass the pixel brightness value map. The calibration curve is converted to the actually received gamma ray energy spectrum 280, which satisfies the following conditions: D = aI _TOT + b

Where D is the sum of the gamma ray dose rates, a and b are constants and a>0 and b≧0.

In summary, the gamma ray dose rate measurement system of the present invention utilizes a detachable type The combination of the shading device and the electronic device image processing technology, and the electronic device that people carry with them, replaces the radiation detector with the electronic device image sensor, does not require an additional power source, does not require additional scintillation crystals, and does not affect the function of the original electronic device. The gamma ray image, the sum of the gamma ray dose rate, and the gamma ray energy spectrum can be obtained at one time.

The gamma ray dose rate measuring system of the invention can solve the problems of high cost, large volume and maintenance cost of the conventional radiation detecting instrument, and the gamma ray dose rate measuring system of the invention is easy to operate, and the operator does not need education. Training, you can immediately know the radiation dose rate of the measured object and the environment in the area through image processing, which greatly improves the convenience and closeness of the radiation detection.

The above description is only exemplary and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

100‧‧‧shading device

200‧‧‧Electronic devices

201‧‧‧Sense Module

203‧‧‧Image Analysis Module

204‧‧‧Display module

205‧‧‧gamma ray image

Claims (7)

A gamma ray dose rate measurement system comprising: a shading device for shielding a visible light such that a light source passing through the shading device is substantially a gamma ray; and an electronic device comprising: a sensing The module senses the gamma ray to generate a current signal; an image analysis module receives the current signal and analyzes the current signal to generate a gamma ray dose rate sum and a gamma ray energy spectrum And a display module is configured to display the analysis result; wherein the light shielding device is detachably coupled to the electronic device and disposed on an optical path of the external light source entering the sensing module, so as to enter the The light source of the sensing module is substantially the gamma ray; wherein the image analysis module comprises a processor unit, a storage unit and a dose rate calculation unit; the processor unit analyzes the current signal to generate a gamma The ray image is stored in the storage unit, and the dose rate calculation unit reads the gamma ray image and performs a dose rate calculation to obtain the gamma ray a sum of the rate and the gamma ray energy spectrum; wherein the dose rate calculation is performed by the noise filtering module, the pixel brightness statistic module, and a dose rate conversion module included in the dose rate calculating unit Completing; the noise filtering module first performs a noise filtering on the gamma ray image, and the pixel brightness statistic module continues to perform a pixel according to the gamma ray image after the noise filtering In the brightness statistics, the dose rate conversion module performs a dose rate conversion on the gamma ray image after the pixel brightness is counted. The gamma ray dose rate measuring system according to claim 1, wherein the shading device is a columnar structure or a sheet structure. The gamma ray dose rate measuring system according to claim 1, wherein the shading device is an opaque metal material or an alloy thereof, an opaque non-metal material or a composite material thereof or a combination thereof. The gamma ray dose rate measurement system according to claim 1, wherein the sensing module is a complementary metal oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD) image sense. Detector. The gamma ray dose rate measurement system of claim 1, wherein the noise filtering system comprises a color discrimination module and a pixel connection mark module included in the noise filtering module. And completed; the color discrimination module examines one by one and determines whether the relationship between the luminance value of one pixel and a proportional parameter m conforms to I _R ≦(I _G +1)×m or I _B ≦(I _G +1)× m, where I _R , I _G , and I _B are the red, green, and blue luminance values of the pixel, respectively, 1≦m≦2; if they are met, they are regarded as a first signal pixel, and vice versa. And the first communication pixel is deleted by the noise pixel; the pixel connection mark module gives the same signal to the first signal pixel in the same connected area, and then determines by adding the first signal pixel having the same mark The size of the connected area is regarded as a second signal pixel if the size of the connected area exceeds a predetermined size, and is regarded as a second noise pixel and the second noise pixel is deleted. The gamma ray dose rate measurement system according to claim 5, wherein the pixel brightness statistic system comprises a pixel brightness summation module and a pixel brightness value square pattern module included in the pixel brightness statistic module. The pixel brightness summation module sums the brightness values of all the second signal pixels in the gamma ray image to satisfy the following conditions: Wherein, I _{TOT is} the sum of the brightness of one of the pixels of the second signal, and the dimension of the gamma ray image is M×N, wherein M and N are positive integers, and I _{i is} the brightness value; The module accumulates the number of each of the luminance values by a one-dimensional function and counts a luminance distribution characteristic to generate a pixel luminance value square graph, and the one-dimensional function satisfies the following conditions: Where k is the number of categories of the luminance value classification, and the range is 0 to 255. The gamma ray dose rate measurement system according to claim 6, wherein the dose rate conversion system converts the pixel luminance sum I _TOT through a calibration curve into an actual measurement by the dose rate conversion module. The sum of the gamma ray dose rate and the conversion of the pixel luminance value map through the calibration curve to the actually received gamma ray energy spectrum; the calibration curve satisfies the following condition: D = aI _TOT + b where D For the sum of the gamma ray dose rates, a and b are constant and a > 0 and b ≧ 0.